109545509 has 4 divisors (see below), whose sum is σ = 110630220. Its totient is φ = 108460800.

The previous prime is 109545473. The next prime is 109545521. The reversal of 109545509 is 905545901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82992100 + 26553409 = 9110^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 109545509 - 2⁸ = 109545253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109545409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542204 + ... + 542405.

It is an arithmetic number, because the mean of its divisors is an integer number (27657555).

Almost surely, 2^109545509 is an apocalyptic number.

It is an amenable number.

109545509 is a deficient number, since it is larger than the sum of its proper divisors (1084711).

109545509 is a wasteful number, since it uses less digits than its factorization.

109545509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084710.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 109545509 is about 10466.3990464725. The cubic root of 109545509 is about 478.4811786535.

The spelling of 109545509 in words is "one hundred nine million, five hundred forty-five thousand, five hundred nine".